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A/C self diagnostic system


I am currently having some problems with my A/C in my Audi V8 Quattro 1989 model.

Are there anyone who can tell me what kind of information you can read out off
the self diagnostic system.

The A/C unit is an improved version of the digital climate control system who was
fittet into the Audi 100/200 (5000) line from November 1985.

There are 22 channels where:

Channel 11 - Shows the voltage who are supplied to the A/C control unit.

Channel 15 - Shows the voltage who are currently being feed to the fan.
             0.0 - fan off, 4.0 - fan at minimum, 12,1 - fan at maximum.
Channel 22 - Shows the speed of the car.
             The figure is about 5-6 kph lower than the actual speed.

I don't know what the rest of the channels do.

Please help.

John Torset
Amiga 4000